template-contentmethod-only-html-001.html

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This WPT test may be referenced by the following Test IDs:
- /html/dom/partial-updates/tentative/template-contentmethod-only-html-001.html - WPT Dashboard Interop Dashboard

<!DOCTYPE HTML>

<meta charset="utf-8" />

<title>HTML partial updates: template with contentmethod does not work in XHTML</title>

<link rel=help href="https://github.com/WICG/declarative-partial-updates">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<body>

<script>

promise_test(async () => {

    const iframe = document.createElement("iframe");

    iframe.src = "resources/contentmethod.xhtml";

    document.body.append(iframe);

    await new Promise(resolve => iframe.addEventListener("load", resolve));

    const {contentDocument} = iframe;

    assert_not_equals(contentDocument.querySelector("#patch"), null);

    assert_equals(contentDocument.querySelector("#placeholder").textContent, "Unchanged");

});

</script>